зеркало из https://github.com/mozilla/pjs.git
620 строки
17 KiB
C++
620 строки
17 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK *****
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*
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* This Original Code has been modified by IBM Corporation. Modifications made by IBM
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* described herein are Copyright (c) International Business Machines Corporation, 2000.
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* Modifications to Mozilla code or documentation identified per MPL Section 3.3
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*
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* Date Modified by Description of modification
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* 04/20/2000 IBM Corp. OS/2 VisualAge build.
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*/
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/*
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* style sheet and style rule processor representing data from presentational
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* HTML attributes
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*/
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#include "nsHTMLStyleSheet.h"
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#include "nsINameSpaceManager.h"
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#include "nsIAtom.h"
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#include "nsIURL.h"
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#include "nsMappedAttributes.h"
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#include "nsILink.h"
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#include "nsIFrame.h"
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#include "nsStyleContext.h"
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#include "nsGkAtoms.h"
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#include "nsPresContext.h"
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#include "nsEventStates.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "nsStyleConsts.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsRuleWalker.h"
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#include "nsRuleData.h"
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#include "nsContentErrors.h"
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#include "nsRuleProcessorData.h"
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#include "nsCSSRuleProcessor.h"
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#include "mozilla/dom/Element.h"
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#include "nsCSSFrameConstructor.h"
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using namespace mozilla::dom;
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NS_IMPL_ISUPPORTS1(nsHTMLStyleSheet::HTMLColorRule, nsIStyleRule)
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/* virtual */ void
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nsHTMLStyleSheet::HTMLColorRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) {
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nsCSSValue* color = aRuleData->ValueForColor();
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if (color->GetUnit() == eCSSUnit_Null &&
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aRuleData->mPresContext->UseDocumentColors())
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color->SetColorValue(mColor);
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}
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}
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#ifdef DEBUG
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/* virtual */ void
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nsHTMLStyleSheet::HTMLColorRule::List(FILE* out, PRInt32 aIndent) const
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{
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}
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#endif
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NS_IMPL_ISUPPORTS1(nsHTMLStyleSheet::GenericTableRule, nsIStyleRule)
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#ifdef DEBUG
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/* virtual */ void
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nsHTMLStyleSheet::GenericTableRule::List(FILE* out, PRInt32 aIndent) const
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{
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}
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#endif
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/* virtual */ void
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nsHTMLStyleSheet::TableTHRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Text)) {
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nsCSSValue* textAlign = aRuleData->ValueForTextAlign();
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if (textAlign->GetUnit() == eCSSUnit_Null) {
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textAlign->SetIntValue(NS_STYLE_TEXT_ALIGN_MOZ_CENTER_OR_INHERIT,
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eCSSUnit_Enumerated);
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}
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}
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}
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/* virtual */ void
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nsHTMLStyleSheet::TableQuirkColorRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) {
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nsCSSValue* color = aRuleData->ValueForColor();
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// We do not check UseDocumentColors() here, because we want to
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// use the body color no matter what.
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if (color->GetUnit() == eCSSUnit_Null)
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color->SetIntValue(NS_STYLE_COLOR_INHERIT_FROM_BODY,
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eCSSUnit_Enumerated);
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}
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}
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// -----------------------------------------------------------
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struct MappedAttrTableEntry : public PLDHashEntryHdr {
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nsMappedAttributes *mAttributes;
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};
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static PLDHashNumber
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MappedAttrTable_HashKey(PLDHashTable *table, const void *key)
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{
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nsMappedAttributes *attributes =
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static_cast<nsMappedAttributes*>(const_cast<void*>(key));
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return attributes->HashValue();
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}
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static void
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MappedAttrTable_ClearEntry(PLDHashTable *table, PLDHashEntryHdr *hdr)
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{
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MappedAttrTableEntry *entry = static_cast<MappedAttrTableEntry*>(hdr);
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entry->mAttributes->DropStyleSheetReference();
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memset(entry, 0, sizeof(MappedAttrTableEntry));
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}
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static bool
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MappedAttrTable_MatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
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const void *key)
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{
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nsMappedAttributes *attributes =
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static_cast<nsMappedAttributes*>(const_cast<void*>(key));
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const MappedAttrTableEntry *entry =
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static_cast<const MappedAttrTableEntry*>(hdr);
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return attributes->Equals(entry->mAttributes);
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}
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static PLDHashTableOps MappedAttrTable_Ops = {
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PL_DHashAllocTable,
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PL_DHashFreeTable,
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MappedAttrTable_HashKey,
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MappedAttrTable_MatchEntry,
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PL_DHashMoveEntryStub,
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MappedAttrTable_ClearEntry,
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PL_DHashFinalizeStub,
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NULL
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};
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// -----------------------------------------------------------
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nsHTMLStyleSheet::nsHTMLStyleSheet(void)
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: mDocument(nsnull)
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{
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mMappedAttrTable.ops = nsnull;
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}
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nsresult
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nsHTMLStyleSheet::Init()
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{
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mTableTHRule = new TableTHRule();
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mTableQuirkColorRule = new TableQuirkColorRule();
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return NS_OK;
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}
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nsHTMLStyleSheet::~nsHTMLStyleSheet()
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{
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if (mMappedAttrTable.ops)
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PL_DHashTableFinish(&mMappedAttrTable);
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}
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NS_IMPL_ISUPPORTS2(nsHTMLStyleSheet, nsIStyleSheet, nsIStyleRuleProcessor)
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/* virtual */ void
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nsHTMLStyleSheet::RulesMatching(ElementRuleProcessorData* aData)
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{
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nsRuleWalker *ruleWalker = aData->mRuleWalker;
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if (aData->mElement->IsHTML()) {
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nsIAtom* tag = aData->mElement->Tag();
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// if we have anchor colors, check if this is an anchor with an href
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if (tag == nsGkAtoms::a) {
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if (mLinkRule || mVisitedRule || mActiveRule) {
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nsEventStates state = nsCSSRuleProcessor::GetContentStateForVisitedHandling(
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aData->mElement,
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aData->mTreeMatchContext.VisitedHandling(),
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// If the node being matched is a link,
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// it's the relevant link.
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nsCSSRuleProcessor::IsLink(aData->mElement));
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if (mLinkRule && state.HasState(NS_EVENT_STATE_UNVISITED)) {
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ruleWalker->Forward(mLinkRule);
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aData->mTreeMatchContext.SetHaveRelevantLink();
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}
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else if (mVisitedRule && state.HasState(NS_EVENT_STATE_VISITED)) {
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ruleWalker->Forward(mVisitedRule);
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aData->mTreeMatchContext.SetHaveRelevantLink();
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}
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// No need to add to the active rule if it's not a link
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if (mActiveRule && nsCSSRuleProcessor::IsLink(aData->mElement) &&
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state.HasState(NS_EVENT_STATE_ACTIVE)) {
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ruleWalker->Forward(mActiveRule);
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}
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} // end link/visited/active rules
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} // end A tag
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// add the rule to handle text-align for a <th>
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else if (tag == nsGkAtoms::th) {
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ruleWalker->Forward(mTableTHRule);
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}
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else if (tag == nsGkAtoms::table) {
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if (aData->mTreeMatchContext.mCompatMode == eCompatibility_NavQuirks) {
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ruleWalker->Forward(mTableQuirkColorRule);
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}
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}
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} // end html element
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// just get the style rules from the content
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aData->mElement->WalkContentStyleRules(ruleWalker);
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}
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// Test if style is dependent on content state
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/* virtual */ nsRestyleHint
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nsHTMLStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData)
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{
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if (aData->mElement->IsHTML(nsGkAtoms::a) &&
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nsCSSRuleProcessor::IsLink(aData->mElement) &&
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((mActiveRule && aData->mStateMask.HasState(NS_EVENT_STATE_ACTIVE)) ||
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(mLinkRule && aData->mStateMask.HasState(NS_EVENT_STATE_VISITED)) ||
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(mVisitedRule && aData->mStateMask.HasState(NS_EVENT_STATE_VISITED)))) {
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return eRestyle_Self;
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}
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return nsRestyleHint(0);
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}
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/* virtual */ bool
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nsHTMLStyleSheet::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
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{
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return false;
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}
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/* virtual */ nsRestyleHint
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nsHTMLStyleSheet::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
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{
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// Do nothing on before-change checks
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if (!aData->mAttrHasChanged) {
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return nsRestyleHint(0);
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}
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// Note: no need to worry about whether some states changed with this
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// attribute here, because we handle that under HasStateDependentStyle() as
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// needed.
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// Result is true for |href| changes on HTML links if we have link rules.
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Element *element = aData->mElement;
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if (aData->mAttribute == nsGkAtoms::href &&
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(mLinkRule || mVisitedRule || mActiveRule) &&
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element->IsHTML(nsGkAtoms::a)) {
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return eRestyle_Self;
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}
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// Don't worry about the mDocumentColorRule since it only applies
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// to descendants of body, when we're already reresolving.
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// Handle the content style rules.
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if (element->IsAttributeMapped(aData->mAttribute)) {
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// cellpadding on tables is special and requires reresolving all
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// the cells in the table
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if (aData->mAttribute == nsGkAtoms::cellpadding &&
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element->IsHTML(nsGkAtoms::table)) {
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return eRestyle_Subtree;
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}
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return eRestyle_Self;
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}
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return nsRestyleHint(0);
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}
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/* virtual */ bool
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nsHTMLStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext)
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{
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return false;
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}
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/* virtual */ size_t
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nsHTMLStyleSheet::SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const
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{
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return 0; // nsHTMLStyleSheets are charged to the DOM, not layout
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}
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/* virtual */ size_t
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nsHTMLStyleSheet::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
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{
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return 0; // nsHTMLStyleSheets are charged to the DOM, not layout
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}
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/* virtual */ void
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nsHTMLStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData)
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{
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}
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/* virtual */ void
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nsHTMLStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData)
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{
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}
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#ifdef MOZ_XUL
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/* virtual */ void
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nsHTMLStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData)
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{
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}
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#endif
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// nsIStyleSheet api
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/* virtual */ nsIURI*
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nsHTMLStyleSheet::GetSheetURI() const
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{
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return mURL;
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}
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/* virtual */ nsIURI*
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nsHTMLStyleSheet::GetBaseURI() const
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{
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return mURL;
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}
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/* virtual */ void
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nsHTMLStyleSheet::GetTitle(nsString& aTitle) const
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{
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aTitle.Truncate();
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}
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/* virtual */ void
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nsHTMLStyleSheet::GetType(nsString& aType) const
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{
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aType.AssignLiteral("text/html");
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}
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/* virtual */ bool
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nsHTMLStyleSheet::HasRules() const
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{
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return true; // We have rules at all reasonable times
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}
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/* virtual */ bool
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nsHTMLStyleSheet::IsApplicable() const
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{
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return true;
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}
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/* virtual */ void
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nsHTMLStyleSheet::SetEnabled(bool aEnabled)
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{ // these can't be disabled
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}
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/* virtual */ bool
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nsHTMLStyleSheet::IsComplete() const
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{
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return true;
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}
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/* virtual */ void
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nsHTMLStyleSheet::SetComplete()
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{
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}
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/* virtual */ nsIStyleSheet*
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nsHTMLStyleSheet::GetParentSheet() const
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{
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return nsnull;
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}
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/* virtual */ nsIDocument*
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nsHTMLStyleSheet::GetOwningDocument() const
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{
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return mDocument;
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}
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/* virtual */ void
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nsHTMLStyleSheet::SetOwningDocument(nsIDocument* aDocument)
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{
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mDocument = aDocument; // not refcounted
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}
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nsresult
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nsHTMLStyleSheet::Init(nsIURI* aURL, nsIDocument* aDocument)
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{
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NS_PRECONDITION(aURL && aDocument, "null ptr");
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if (! aURL || ! aDocument)
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return NS_ERROR_NULL_POINTER;
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if (mURL || mDocument)
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return NS_ERROR_ALREADY_INITIALIZED;
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mDocument = aDocument; // not refcounted!
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mURL = aURL;
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return NS_OK;
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}
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void
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nsHTMLStyleSheet::Reset(nsIURI* aURL)
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{
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mURL = aURL;
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mLinkRule = nsnull;
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mVisitedRule = nsnull;
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mActiveRule = nsnull;
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if (mMappedAttrTable.ops) {
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PL_DHashTableFinish(&mMappedAttrTable);
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mMappedAttrTable.ops = nsnull;
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}
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}
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nsresult
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nsHTMLStyleSheet::ImplLinkColorSetter(nsRefPtr<HTMLColorRule>& aRule, nscolor aColor)
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{
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if (aRule && aRule->mColor == aColor) {
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return NS_OK;
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}
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aRule = new HTMLColorRule();
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if (!aRule)
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return NS_ERROR_OUT_OF_MEMORY;
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aRule->mColor = aColor;
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// Now make sure we restyle any links that might need it. This
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// shouldn't happen often, so just rebuilding everything is ok.
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if (mDocument && mDocument->GetShell()) {
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Element* root = mDocument->GetRootElement();
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if (root) {
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mDocument->GetShell()->FrameConstructor()->
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PostRestyleEvent(root, eRestyle_Subtree, NS_STYLE_HINT_NONE);
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}
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}
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return NS_OK;
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}
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nsresult
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nsHTMLStyleSheet::SetLinkColor(nscolor aColor)
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{
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return ImplLinkColorSetter(mLinkRule, aColor);
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}
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nsresult
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nsHTMLStyleSheet::SetActiveLinkColor(nscolor aColor)
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{
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return ImplLinkColorSetter(mActiveRule, aColor);
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}
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nsresult
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nsHTMLStyleSheet::SetVisitedLinkColor(nscolor aColor)
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{
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return ImplLinkColorSetter(mVisitedRule, aColor);
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}
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already_AddRefed<nsMappedAttributes>
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nsHTMLStyleSheet::UniqueMappedAttributes(nsMappedAttributes* aMapped)
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{
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if (!mMappedAttrTable.ops) {
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bool res = PL_DHashTableInit(&mMappedAttrTable, &MappedAttrTable_Ops,
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nsnull, sizeof(MappedAttrTableEntry), 16);
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if (!res) {
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mMappedAttrTable.ops = nsnull;
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return nsnull;
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}
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}
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MappedAttrTableEntry *entry = static_cast<MappedAttrTableEntry*>
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(PL_DHashTableOperate(&mMappedAttrTable, aMapped, PL_DHASH_ADD));
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if (!entry)
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return nsnull;
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if (!entry->mAttributes) {
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// We added a new entry to the hashtable, so we have a new unique set.
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entry->mAttributes = aMapped;
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}
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NS_ADDREF(entry->mAttributes); // for caller
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return entry->mAttributes;
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}
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void
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nsHTMLStyleSheet::DropMappedAttributes(nsMappedAttributes* aMapped)
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{
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NS_ENSURE_TRUE(aMapped, /**/);
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NS_ASSERTION(mMappedAttrTable.ops, "table uninitialized");
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#ifdef DEBUG
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PRUint32 entryCount = mMappedAttrTable.entryCount - 1;
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#endif
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PL_DHashTableOperate(&mMappedAttrTable, aMapped, PL_DHASH_REMOVE);
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NS_ASSERTION(entryCount == mMappedAttrTable.entryCount, "not removed");
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}
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#ifdef DEBUG
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/* virtual */ void
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nsHTMLStyleSheet::List(FILE* out, PRInt32 aIndent) const
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{
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// Indent
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for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
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fputs("HTML Style Sheet: ", out);
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nsCAutoString urlSpec;
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mURL->GetSpec(urlSpec);
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if (!urlSpec.IsEmpty()) {
|
|
fputs(urlSpec.get(), out);
|
|
}
|
|
fputs("\n", out);
|
|
}
|
|
#endif
|
|
|
|
static size_t
|
|
SizeOfAttributesEntryExcludingThis(PLDHashEntryHdr* aEntry,
|
|
nsMallocSizeOfFun aMallocSizeOf,
|
|
void* aArg)
|
|
{
|
|
NS_PRECONDITION(aEntry, "The entry should not be null!");
|
|
|
|
MappedAttrTableEntry* entry = static_cast<MappedAttrTableEntry*>(aEntry);
|
|
NS_ASSERTION(entry->mAttributes, "entry->mAttributes should not be null!");
|
|
return entry->mAttributes->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
size_t
|
|
nsHTMLStyleSheet::DOMSizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
|
|
{
|
|
size_t n = aMallocSizeOf(this);
|
|
|
|
if (mMappedAttrTable.ops) {
|
|
n += PL_DHashTableSizeOfExcludingThis(&mMappedAttrTable,
|
|
SizeOfAttributesEntryExcludingThis,
|
|
aMallocSizeOf);
|
|
}
|
|
|
|
// Measurement of the following members may be added later if DMD finds it is
|
|
// worthwhile:
|
|
// - mURL
|
|
// - mLinkRule
|
|
// - mVisitedRule
|
|
// - mActiveRule
|
|
// - mTableQuirkColorRule
|
|
// - mTableTHRule
|
|
//
|
|
// The following members are not measured:
|
|
// - mDocument, because it's non-owning
|
|
|
|
return n;
|
|
}
|
|
|
|
// XXX For convenience and backwards compatibility
|
|
nsresult
|
|
NS_NewHTMLStyleSheet(nsHTMLStyleSheet** aInstancePtrResult, nsIURI* aURL,
|
|
nsIDocument* aDocument)
|
|
{
|
|
nsresult rv;
|
|
nsHTMLStyleSheet* sheet;
|
|
if (NS_FAILED(rv = NS_NewHTMLStyleSheet(&sheet)))
|
|
return rv;
|
|
|
|
if (NS_FAILED(rv = sheet->Init(aURL, aDocument))) {
|
|
NS_RELEASE(sheet);
|
|
return rv;
|
|
}
|
|
|
|
*aInstancePtrResult = sheet;
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
nsresult
|
|
NS_NewHTMLStyleSheet(nsHTMLStyleSheet** aInstancePtrResult)
|
|
{
|
|
NS_ASSERTION(aInstancePtrResult, "null out param");
|
|
|
|
nsHTMLStyleSheet *it = new nsHTMLStyleSheet();
|
|
if (!it) {
|
|
*aInstancePtrResult = nsnull;
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_ADDREF(it);
|
|
nsresult rv = it->Init();
|
|
if (NS_FAILED(rv))
|
|
NS_RELEASE(it);
|
|
|
|
*aInstancePtrResult = it; // NS_ADDREF above, or set to null by NS_RELEASE
|
|
return rv;
|
|
}
|
|
|